A243315 Number of ways to reciprocally link elements of an n X 9 array either to themselves or to exactly one king-move neighbor.

1, 55, 237472, 371654153, 757341382671, 1450226501771584, 2820152941289640505, 5463664833842177843423, 10594819370472223969569120, 20540255065209806005525289313, 39823725482559144291828665014967, 77209746313875957204633819730760448

Offset: 0

Author

Alois P. Heinz, Jun 03 2014

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..100

Crossrefs

Column k=9 of A220644.